How soon does aggression decrease after neutering

by Janet
(Albuquerque, NM)

I adopted a 2 year old cat from the shelter who was not neutered. He was neutered before I took him home. But he has been extremely aggressive towards my other cats. How long does this last? How long does it take for the testosterone last after neutering? Will the agression stop or just subside a little? What can I expect?


answer by Kate
well it can take a while before all the hormaones stop producing and leave the cats ystem completely. Perhaps even a month or so.
However i would suggest that the aggression is not down to his hormones but is a natural cat behavior when entering anew home and being confronted with other animals. As long as they were introduced properly (see my page about introducing cats under the training section) they should settle down once they have sorted out there place in the home.
Make sure all your cats have there own litter trays and sleeping area also to reduce any tensions there.
Give it time, normallly cats will sort out there differences and either become best friends or will just avoid each other, either way things should settle down it may just take longer than we humans would like.
best wishes Kate

Comments for How soon does aggression decrease after neutering

Click here to add your own comments

Male Cat Aggression
by: Anonymous

A male cat, that at the time was probably about 7mos. old, showed up at my door Jan. 2018 - It's now Mid August, 2019 - He's had to stay in a spare bedroom the entire time because he was a stray, and not able to get vaccines - Until 3-weeks ago - It's now been 3-weeks - I've not yet allowed him out of that room and be loose, because of his aggression - Especially towards me -I do, on occasion, put a collar & leash, and he comes out for just a while - When I leave the room, he wants to attack - When I go in, which is quite frequent, he's very affectionate, but it's more of that restlessness, cat cry, tail swish, and rub against me - Yet when I get up to leave, it's an IMMEDIATE attack!! I've never had an aggression issue with a cat - Will this EVER go away? HOW long ??

Click here to add your own comments

Return to Cat Questions Archive One.


I'd love to hear what you think of this page or my site. Let me know if you like what you have read or if it has helped you with a problem.

It's easy to do just leave a comment in the box below and click the like / share or +1 to let others know about my site. Thank You It really is most appreciated.